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Sun Dogs ~ are made of a large family of halos, created by light interacting with ice crystals in the atmosphere. Sun Dogs are best seen and most conspicuous when the Sun is close to the horizon.

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7 (More!) Phenomenal Wonders of the Natural World

Sundogs, like light pillars, sundogs are the product of light passing through crystals.

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Sundogs are made commonly of plate-shaped hexagonal ice crystals in high and cold cirrus clouds or, during very cold weather, by ice crystals called diamond dust drifting in the air at low levels. These crystals act as prisms, bending the light rays passing through them with a minimum deflection of 22°. If the crystals are randomly oriented, a complete ring around the sun is seen — a halo.

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Sky Phenomena: Sun Dogs: "...an atmospheric phenomenon that creates bright spots of light in the sky, often on a luminous ring or halo on either side of the sun. Sundogs may appear as a colored patch of light to the left or right of the sun, 22° distant and at the same distance above the horizon as the sun, and in ice halos. They can be seen anywhere in the world during any season, but they are not always obvious or bright. Sundogs are best seen and are most conspicuous when the sun is…

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Wow! The phenomenon, called a Sundog, happens when ice crystals appear in clouds and refract the sun's rays. Taken in Heyworth, Illinois, US.

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Very unusual sky…

Very unusual sky - The phenomenon could probably be a sun dog or nimbus. Any opinions?

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